Metropolitan Police tweeted a chilling warning about how to avoid a terrorist attack as London residents remained in the dark over whether those who attacked London Bridge had been caught.

Seven people were killed when three armed men ploughed a van into pedestrians before leaping from the vehicle and stabbing people in nearby bars and restaurants.

While Londoners were listening to the news, still wondering if the terrorists were on the run in the city, Metropolitan Police tweeted out a chilling warning to its followers.

The image showed three large words: “Run, Hide, Tell”.

Police ordered people: “You must: RUN – to a place of safety. This is a better option than to surrender or negotiate. If there’s nowhere to go, then…”

“HIDE – Turn your phone to silent and turn off vibrate. Barricade yourself in if you can.

“TELL – the police by calling 999 when it is safe to do so.”

The order to turn phones to silent and turn off vibrate – so that nearby attackers could not hear you if you’re hiding and relatives are trying to get in touch – particularly seemed to alert people that this was indeed a major incident and more lives were at risk.